/Engine/Plugins/NetcodeUnitTest/NetcodeUnitTest/Source/NetcodeUnitTest/Public/NUTUtilDebug.h
This also hooks into console commands as well, allowing it to be used throughout the engine, instead of depending on this module. See the documentation for the 'StackTrace' command in UnitTestManager.cpp.
class FStackTraceManager
TMap<FString, ...
Traces
A map of active debug stack traces